McCann's Fruit Crumble

INGREDIENTS

• 4 tablespoons unsalted butter, melted, plus more for baking dish
• 1 cup coarsely chopped rhubarb
• 1 cup peeled, cored, and coarsely chopped apples
• 1/4 cup Irish whiskey
• 1 1/2 cups light-brown sugar
• 1 1/2 cups McCann's Quick-Cooking Irish Oatmeal
• 1 cup all-purpose flour
• 1 teaspoon baking powder
• 2 teaspoons ground cinnamon
• 2 cups mixed berries, preferably strawberries and blueberries
• 1 cup heavy cream
• 2 tablespoons confectioners' sugar
• 1 tablespoon Bailey's Irish Cream